<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - clang-cl fails to compile atlctrlw.h header from WTL (delayed template instantiation)"
   href="https://llvm.org/bugs/show_bug.cgi?id=26748">26748</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-cl fails to compile atlctrlw.h header from WTL (delayed template instantiation)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>andreybokhanko@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>A simple reproducer:

class CCommandBarCtrlBase {
public:
  typedef int CMsgHookMap;
};

template <class T>
class CCommandBarCtrlImpl : public T {
public:
  void foo() {
    void *p = new CMsgHookMap; // "new typename T::CMsgHookMap" works fine
  }
};

void bar() {
  CCommandBarCtrlImpl<CCommandBarCtrlBase> x;
  x.foo();
}


$ clang-cl H:/test.cpp -c
H:/test.cpp(10,19) :  error: unknown type name 'CMsgHookMap'
    void *p = new CMsgHookMap; // "new typename T::CMsgHookMap" works fine
                  ^
1 error generated.


This construct is used in atlctrlw.h header
(<a href="https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l995">https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l995</a>):

ATLTRY(s_pmapMsgHook = new CMsgHookMap);


"CMsgHookMap" is declared in a base class
(<a href="https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l144">https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l144</a>):

typedef ATL::CSimpleMap<DWORD, _MsgHookData*>   CMsgHookMap;


Yours,
Andrey
=====
Software Engineer
Intel Compiler Team</pre>
        </div>
      </p>
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